Questions

gistfile1.md

PHP

null == 0;
0 == "0x0";
null != "0x0";

Why?

JS

[,,,].join() === ',,'

Why?

x = 1;
if (false)
    x = 3;
    x = 4;

x === 4;

Why?

Git

git bisect

Explain.

git push
git reset --hard DEADBEEF
git push --force

Why not?

git commit -m"changes"
git pull

Why not?